Encyclopedia Britannica Sues OpenAI Over Copyright Infringement

Encyclopedia Britannica and its subsidiary Merriam-Webster have filed a lawsuit against OpenAI in Manhattan federal court, alleging that the company unlawfully used their copyrighted content to train its AI models, specifically GPT-4. The lawsuit claims that OpenAI's ChatGPT generates responses that include "near-verbatim" reproductions of Britannica's articles and dictionary entries, which the company asserts were memorized without authorization. Britannica contends that this practice not only infringes on their copyright but also constitutes trademark infringement, as ChatGPT allegedly produces fabricated content that misattributes information to Britannica.

EngadgetBritannica Sues OpenAI Over ChatGPT 'Memorizing' ContentEncyclopedia Britannica sues OpenAI over AI training By ReutersThe Verge

The lawsuit, filed on March 16, 2026, outlines that OpenAI has "cannibalized" Britannica's web traffic by providing AI-generated summaries that compete directly with Britannica's content, rather than directing users to their website as traditional search engines do. Britannica's complaint highlights that OpenAI has copied nearly 100,000 of its articles to train its models, resulting in outputs that closely mirror the original text. The suit does not specify a monetary amount for damages but seeks an injunction to prevent further infringement.

Encyclopedia Britannica sues OpenAI over AI training By ReutersThe VergeEngadgetBritannica Sues OpenAI Over ChatGPT 'Memorizing' Content

In response to the lawsuit, a spokesperson for OpenAI stated that their models are designed to enhance creativity and support scientific discovery, asserting that they are trained on publicly available data and grounded in fair use. OpenAI is currently facing multiple legal challenges regarding its training practices, including an ongoing lawsuit from The New York Times, which has made similar allegations of copyright infringement.

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This lawsuit adds to a growing trend of legal actions against AI companies by publishers and content creators. Britannica's legal action follows a similar lawsuit against the AI startup Perplexity AI, highlighting concerns over the use of copyrighted materials in AI training without proper authorization. The case reflects a broader debate over intellectual property rights in the age of artificial intelligence, as various stakeholders, including authors and visual artists, seek to protect their work from unauthorized use.

Encyclopedia Britannica sues OpenAI over AI training By Reuters

Critics of OpenAI's practices argue that the company engages in a pattern of wholesale copying, undermining the efforts of content creators who invest significant resources into producing high-quality information. The lawsuit emphasizes the need for clearer guidelines and protections for intellectual property in the rapidly evolving landscape of AI technology.

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As the legal proceedings unfold, the outcome of this case may have significant implications for the future of AI training practices and copyright law. The resolution could set a precedent for how AI companies utilize copyrighted materials and the extent to which they can claim fair use in their operations.

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• “GPT-4 itself has ‘memorized’ much of Britannica’s copyrighted content and will output near-verbatim copies of significant portions on demand. The memorized examples are unauthorized copies that [OpenAI] used to train their models, including GPT-4.” — Encyclopedia Britannica

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• “ChatGPT helps enhance human creativity, advance scientific discovery and medical research, and enable hundreds of millions of people to improve their daily lives. Our models empower innovation, and are trained on publicly available data and grounded in fair use.” — OpenAI Spokesperson

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